Feed water heater



.Aug. 18, 1931.'

K. MUHLEISEN FEED` WATER HEATER Filed Aug. 28. 1950 v Agni/171111111 l 11s/VENTO@ v Patented Aug. 18, 1931 l refiera atar erica l KARL MUHLEISEN, OE PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO SCI-IUT'IE AND KOERTING COMPANY,` OIE' PHILADELPHIA, PENNSYLVANIA, A CORPORATION 0F PENNSYLVANIA FEED VATER HEATER Application inea August as, 1930. serial No. 478,471.

My invention relates broadly to means or apparatus forthe heating of water or other fluid. More especially it has relation to means or apparatus forheating water for use in steam boilers and the like.

The invention has for its general object'to provide a fluid heating means of novel char-A acter mcludingfeatures of construction the presence of whichV facilitates repair and also Vthe assembly of they parts in the original construction of the said means.

It also has for its object to provide means of the character indicated including` a head-y er and tubular heater coils, the opposite ends 11g-of the tubes of the coils terminating in the header in adjoining' or side by lside relation to each other.

A'urther object of the invention is to provide aluid heater of the character indi- 26 cated comprisinga header having fluid supplyl and discharge chambers therein Vin adjoining relation to each other and heating coils the opposite ends of the pipes of the respective coils being located `in. adjoining or 25 side by side relation to each other and communicating respectively with the fluid supply an'd discharge chambers. A still further object fof the invention is to provide a water or other fluid heating ap- 30v paratus comprising coils the opposite ends'of the tubes of which terminate in adjoining relation toeach other, which ends are iX-` edly -anchored within a header of the said apparatus and the opposite end of each of the said lcoils being detachably supported to -tubular heating elements each of which embodies means whereby variations of pressure therein result in the removal from the interiorr surfaces thereof of any scale or othery deposit which may be formed'thereon.

* still further object of the invention is to provide an improved Vconstruction of means for connecting the ends of the pipes which embody the heating coils with a header of the'apparatus;

prevent lateral or swinging movement there-` nother object of the invention is to provide a water heating apparatus comprising I shall not undertaketo set -forth inlthis part of the spec'iication ot' my applicationr for Letters Patent the further objects and advantages ofmy invention but such furtherV objects andadvantages will be referred to in the detailed description of thel invention Which follows or elsewill be apparent there- 1n.

in order that the invention may be readily understood and its practical advantages fully appreciated reference should be had to the accompanying drawings, wherein I haveV illustrated an embodiment ot' the invention in the form which at present is 'preferred' by me. However, it is to be understood" that the invention' may be embodied in `other forms or construction than that shown and that changes in the details o'l:lv construction-v may be made within the scope of the claims without'depa'rting fromthe invention or the principle thereof. 'Y

In the drawings: l

Fig. l is a view partly in side elevation and partly in vertical section;

Fig. 2 is a view partly vin top plan and partly in transverse sectional plan;

Fig. 3 is a view in longitudinal section of a portion of ya coil and in longitudinal lsection and elevation of a portionof the or casing of suitable material such as iron,

steel, or the like. It may be formed by casting or by the employment of a plate or plates riveted together in known manner. The upper end portion of the shell is extended inwardly as indicated at 2 and is providedvwith a central opening 3 surrounded by aiiat Vsurface l to which one end of a pipe is adapted to be secured,ffrom which pipe, steam `.or other heated -fluid maybe dis-rv charged into the interior of the shell or casing 1. The opposite end of the casing is closed by means of a header 5 consisting of suitable material such as cast iron, cast steel, bronze, or the like. The said header has inlet and discharge chambers 10 and 11. The latter chamber is provided by an annular hollow casing 12 which may be of any desired shape in cross section, as for example rectangular, as shown in the drawings. The casing 12 projects downwardly from the top of the header 5 toward the bottom .thereof and in -so doing divides the upper portion of the chamber 10 into two annular parts 13 and 14.

The fluid, usually water, is supplied to the inlet or supply chamber 10 through a port 15 to which an end of a supply pipe is connected in obvious manner. Such pipe is connected to a source of fluid (usually water) supply. The water or other fluid which enters the chamber 10 fills the said chamber including the portions 13 and 14 and flows therefrom through the coils 16 and 17 and from the latter into the discharge chamber 11.

The coils 16 and 17 are arranged in two circular series, the said two series being in concentric relation to eachother, as is clearly shown in Fig. 2 of the drawings. Both series are interrupted opposite an opening 20 provided in the shell or casing 1 near the lower` end thereof. rlhe said opening is closed by means of a covering or closing plate 21 secured to the shell by means of fastening screw bolts 22.

The water or other fluid is conducted from the portion 13 of the chamber 10 to each of the coils 16 through an extension 23 which merges into the lower end of said coil. Theupper end of each coil 16 is eX- tended upwardly as indicated at 24 and is then bent laterally and downwardly as indicatedV at 25 and extends as a straight section 26 downwardly through the coil and thence to the discharge chamber 11.

The water or other fluid is conducted from the portion 14 of the inlet chamber 10 to each of the coils 17 through an extension 27 which Vextends upwardly through the said coil and at its upper end is bent laterally and downwardlyT and merges into the upper end'of the coil 17 as indicated at 28. The lower end of the coil is continued by` an extension 29 which discharges into the discharge chamber 11.

It will be noted that the fluid, usually water, which is supplied to and flows through the respective coils 16 and 17 of the outer and inner series of coils is discharged into the single discharge .chamber 11. From said chamber the fluid passes through the outlet 33 and thence through a pipe (not shown) to a boiler or other destination. By the location of the inlet and outlet connections in the header 5 side by side and in near relation to each other the bypassing of the heater to avoid the passing of the fluid through the coils may be readily effected by means of valves (not shown) without the use of connecting pipes such as are necessary if, for example, the inlet connection is located at one end ofthe heater and the outlet connection at the opposite end thereof.

For the purpose of connecting the tubular portions or sections 23, 26, 27 and 29 to the respective'chambers7 as described, I employ in each case a short tubular section 30 the lower end of which has screw-threaded engagement with an opening through the top of the header leading either into the inlet or supply chamber or into the outlet or discharge chamber. The upper end portion of each tubular sectionv is screw-threaded as shown at 31 and the extreme upper end thereof is beveled or tapered inwardly as indicated at 32. The tapered end of each tubular section 30 projects into the flared end portion 35 of a pipe connection, as depicted in Fig. 4. The angle of the taper upon the outer end of the tubular section 30 should not be suicient to cause a bending and stretching of the flared end 35 -to such an extent as to split or fracture the same. The eXtreme end portions ofthe pipe connection are bent back or reversely as indicated at 36 in a direction substantially parallel with t-he length of the said pipe connection. An. annular fillermember 37 of practically triangular cross section-foccupies the annular practically triangular space between the portion 36 and the flared portion 35.

Prior to the bending and flaring of the end of a pipe connection, as shown in Fig. 4, a tapped coupling nut 40 is inserted over the end of the said pipe connection so that when it is desired to connect a pipe connection with the outer upper Vend of a tubular section `30it is only necessary to screw the coupling nut 40 down upon the screwthreaded portion 31. the coupling nut 40 engages the outer square edge of the filler 37 and forces the same downwardly toward the tapered surface at the outer end of the tubular section 30 and causes the inner surface of the flared portion 35 to contact with the surface of the tapered end portion of the said tubular section 30. y It will be apparent that by this means a water tight joint may be provided. The contacting surface of the flared end of the pipe connection being located on the inside thereof it is not aptto become scratched or The shoulder 41 ofy roughened by the contact therewith of eX- tion 35 and the surface of the tapered end portion 32 of the tubular section 8O will not f fastened withiny the inside of the shell or casing l` near the upper end thereof. "The plate 52 has a central opening 53 therein which is in opposed relation to a similar opening 54 provided in the header 5. The heated fluid which mayk be supplied to the casing l through the opening or yport 3 leaves the casing through the opening 54 and is conducted therefrom by a pipe, not shown, connected to the portion of the bottom of the casing surrounding the opening 54, the said pipe being connected to the bottom of the said header by fastening bolts which engage screw-threaded openings 55.

It will be apparent that each coil is supported at its lower end by the opposite ends of the pipe or tube of which it isformed, the said ends having connection to the top of the header 5 at points in adjoining relation to each other, as clearly shown in Fig.

1 of the drawings; and also that the upper Y end of each coil is steadied and held against lateral movement or vibration by its contact with the edge of the opening in the plate 52 within which it may be located.

The opening 20 is of a size to permit access to the coils or any one of them and to the fastening means by which they are connected to the top of the header 5 so that any one of said coils may be removed without the removal of the header 5 or any other portion, except the closing plate 21, of the structure. least one coil 17 before a coil 16 can be re- Y moved. In the removal of a coil 17 the coupling nuts 40 by which the opposite ends thereof are secured to two of the tubular sections 30 are unscrewed from the said sections after which the said coil may be moved laterally and slightly downwardly to release flattened portion causes a distortion of the cross sectional profile of the pipe upon variation of the internal pressure therein. These pressures may vary but at the present time in standard designs the working pressure of the fluid in the tubes is about three hunldred pounds per square inch, while the working pressure of the heating fluid, as forexample steam, is about ifty pounds per square It is Vnecessary to remove atV inch.' The difference Y in thesevpressures,

causes aslight expansion of the -pipes-or.;`

tubes and sucheXpansiom-due to the prese vence 'ofl the fiat portions 56, causesa change. in the cross sectional shapethereofg Uponv release of the pressure the said pipesv return to their normal or original shapeand when this happens the scale or other deposit is loosened from the interior surfaces'of" the pipes or tubes. f Y 1" It will be seen that `by my inventionrI have provided a fluid heating means, which, when employed for .heatingthe water suplied to a boiler or the likeJ is known as a eed water heater,` which is of simple con-A struction and rwhich embodies various practical features which cheapen4 the costof'construction, facilitate the making ofV repairs and render the same morev eflicient. The construction also, without the loss of ruggedness and strength, is` lighter than such 1 `of the use of a single header at one endfofA the shell. or casing instead of two, one at each end of the shell or casing, as is usually the case. v

Having thus described my invention what I claim and desire to secure by Letters Patent is:

1. In fluid heating means the combination Vof a hollow casing, a hcaderhaving connecl 'fe tion with one end of said casing, said header comprising inlet and outlet chambers, Vsaid chambers being located below the inner side of the said header and one ofthe said chambers being inclosed by the other, coils located within the said casing, the opposite ends of which have connection with the inner end of the said header, one end of each coil being inV communication with the inlet chamber and the other end thereof in communi.- cation with the outlet chamber and the said ends constituting supports for the said coils, and a plate secured in the said casing in spaced relation to the said header, said plate having openings therein within which lare located the upper ends of the said coils.

2. In fluid heating means the combination of a casing,a header secured to one end of the said casing, said header including annular chambers one of which is located Within the other, tubular coils located within the said casing, the opposite ends of each of which are extended in the same direction and terminate in adjoining relation to each other, means for securing said ends to the top of the said header, one end of each coil being in communication with the inlet chamber and the other end thereof being in communication with the outlet chamber, the said coils extending away from the said header lengthwise of the said casing, and a plate secured in said casing in spacedv relation to the said header, said plate having openings therethroughwithin which the ad r joining ends of the said coils are located.

3. In fluid heating means the combination of a casing, a header secured to one end of said casing, said header comprising annular inlet and outlet chambers, said chambers being coneentrically related to each other, a plurality of series of pipe coils located Within said casing, the said plurality of series being concentrically related to each other, the opposite ends of each coil of each series being extended and connected with and supported by the said header, `and an annular plate member secured in the said casing in spaced relation to the said header, said plate having a series of concentrieally related openings therein in which the ends of the said coils furthest from the said header are located.

In testimony that I claim the foregoing as my invention, I have hereunto signed my name this 23rd day of August, A. D.

KARL MUHLEISEN. 

